The shoe/trainer hybrid.
Too casual to be shoes - definitely not trainers as no sport could ever be undertaken in them.

Usually in two-tone brown, often slip-on or velcro, always ugly.

Can be seen on dress down fridays or family holidays as dad thinks they will be good for the pool in the day and the restaurant at night.

"I wish I could wear shorts to the office but I'd look like a dick if I wore them with shoes and the boss wont let me wear trainers"
"You could always wear shrainers like Patrick does?"
"I'd look less of a dick wearing shoes!"